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The absolute properties and evolutionary state for the shortest period field contact binary GSC 1387-0475
Yang, Y. -G.1,2; Wei, J. Y.1; Li, H. -L1
2010
Source PublicationNEW ASTRONOMY
Volume15Issue:1Pages:155-158
AbstractCCD photometric observations of the shortest period field contact binary, GSC 1387-0475, obtained in the observing season in 2008-2009, are presented. From new observations, eleven light minimum times were derived and the orbital period was revised. The light curves in BVR bands were analyzed using the W-D program. It is found that GSC 1387-0475 is an overcontact binary. The derived absolute physical parameters of this binary are: M(p) = 0.443(+/- 0.004)M(circle dot), M(s) = 0.210(+/- 0.003)M(circle dot), R(p) = 0.658(+/- 0.008)R(circle dot), R(s) = 0.496(+/- 0.011)R(circle dot), L(p) = 0.188(+/- 0.005)L(circle dot), and L(s) = 0.090(+/- 0.004)L(circle dot). From the LogL-LogM diagram, the primary component is found to be an evolved star. The additional component of GSC 1387-0475 may remove angular momentum from the central system. With the angular momentum decreasing, the separation between components may decrease, which will cause the inner and out critical Roche lobes to shrink, resulting in an increase degree of overcontact. Finally, GSC 1387-0475 with a deep overcontact degree (i.e., f = 76.3 +/- 2.9%) may evolve into a rapid-rotating single star. (C) 2009 Elsevier B.V. All rights reserved.
KeywordBinaries: Eclipsing Binaries: Close Individuals: Gsc 1387-0475-stars: Multiple
DOI10.1016/j.newast.2009.07.009
Indexed BySCI
Language英语
WOS IDWOS:000270638000022
Citation statistics
Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/7765
Collection空间科学研究部
Affiliation1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
2.Huaibei Coal Ind Teachers Coll, Sch Phys & Elect Informat, Huaibei 235000, Anhui, Peoples R China
Recommended Citation
GB/T 7714
Yang, Y. -G.,Wei, J. Y.,Li, H. -L. The absolute properties and evolutionary state for the shortest period field contact binary GSC 1387-0475[J]. NEW ASTRONOMY,2010,15(1):155-158.
APA Yang, Y. -G.,Wei, J. Y.,&Li, H. -L.(2010).The absolute properties and evolutionary state for the shortest period field contact binary GSC 1387-0475.NEW ASTRONOMY,15(1),155-158.
MLA Yang, Y. -G.,et al."The absolute properties and evolutionary state for the shortest period field contact binary GSC 1387-0475".NEW ASTRONOMY 15.1(2010):155-158.
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